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doc: Add environemt variable overriding to get started

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This comit adds details about the overriding of environment variables such as
ESPPORT and ESPBAUD to the get started guide.
This commit is contained in:
Darian Leung 2018-09-02 21:24:35 +08:00
parent a557e8cc14
commit d268677017
1 changed files with 27 additions and 0 deletions
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docs/en/get-started/index.rst
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@ -315,6 +315,33 @@ That's all what you need to get started with ESP32!
Now you are ready to try some other :idf:`examples`, or go right to developing your own applications. Now you are ready to try some other :idf:`examples`, or go right to developing your own applications.
Environment Variables
=====================
Some environment variables can be specified whilst calling ``make`` allowing users to **override arguments without needing to reconfigure them using** ``make menuconfig``.
+-----------------+--------------------------------------------------------------+
| Variables | Description & Usage |
+=================+==============================================================+
| ``ESPPORT`` | Overrides the serial port used in ``flash`` and ``monitor``. |
| | |
| | Examples: ``make flash ESPPORT=/dev/tty/USB0``, |
| | ``make monitor ESPPORT=COM1`` |
+-----------------+--------------------------------------------------------------+
| ``ESPBAUD`` | Overrides the serial baud rate when flashing the ESP32. |
| | |
| | Example: ``make flash ESPBAUD=9600`` |
+-----------------+--------------------------------------------------------------+
| ``MONITORBAUD`` | Overrides the serial baud rate used when monitoring. |
| | |
| | Example: ``make monitor MONITORBAUD=9600`` |
+-----------------+--------------------------------------------------------------+
.. note::
Users can export environment variables (e.g. ``export ESPPORT=/dev/tty/USB0``).
All subsequent calls of ``make`` within the same terminal session will use
the exported value given that the variable is not simultaneously overridden.
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